Coal liquefaction process streams characterization and evaluation: FT-IR methods for characterization of coal liquefaction products
- Advanced Fuel Research, Inc., East Hartford, CT (United States)
This study was designed to demonstrate the use of two FTIR techniques for the analysis of direct coal liquefaction process-derived materials. The two methods were quantitative FTIR analysis and themogravimetric (TG) analysis with FTIR analysis of evolved products (TG-FTIR). The quantitative FTIR analyses of both whole resids and THF-soluble resids provided quantitation of total hydrogen, aliphatic and aromatic hydrogen, total carbon, total oxygen, hydroxyl and etheric oxygen, and ash contents. The FTIR results were usually in agreement with values derived by other, more conventional methods. However, the accuracies of specific measurements, in comparisons with results from conventional methods, ranged from good to poor. The TG-FTIR method provided approximate analyses of coals and resids. The data provided included the time dependent evolution profiles of the volatile species and the elemental composition of the char. Reproducible data of gaseous species and pyrolysis tar yields for whole resid samples larger than 10 mg were obtainable. The yields and evolution profiles of certain volatiles (tar, CO, and methane) provided structural information on the samples. There were some experimental and interpretational difficulties associated with both techniques. Optimization of the curve-resolving routine for coal-liquefaction samples would improve the quantitative FTIR accuracy. Aerosol formation limited the full application of the TG-FTIR technique with the THF-soluble resid samples. At this time, further development of these analytical methods as process development tools will be required before their use for that purpose can be recommended. The use of FTIR as an on-line analytical technique for coal liquefaction process streams requires demonstration before it can be recommended; however, such a demonstration may be warranted.
- Research Organization:
- Consolidation Coal Co., Library, PA (United States). Research and Development Dept.; Advanced Fuel Research, Inc., East Hartford, CT (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-89PC89883
- OSTI ID:
- 10174577
- Report Number(s):
- DOE/PC/89883-45; ON: DE92041236
- Resource Relation:
- Other Information: PBD: Apr 1992
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COAL LIQUIDS
INFRARED SPECTRA
THERMAL GRAVIMETRIC ANALYSIS
NUMERICAL DATA
COAL LIQUEFACTION
FOURIER TRANSFORMATION
PERFORMANCE TESTING
RECOMMENDATIONS
HYDROGEN
OXYGEN
ASH CONTENT
CARBON
COAL TAR
CARBON MONOXIDE
METHANE
PYROLYSIS PRODUCTS
010405
400102
HYDROGENATION AND LIQUEFACTION
CHEMICAL AND SPECTRAL PROCEDURES